LPS-44847 - 508 Compliance - Blog Portlet comments field is missing a label

Hey @natecavanaugh,

Attached is an update for http://issues.liferay.com/browse/LPS-44847.

NOTE: liferay-plugins/master pull request at https://github.com/natecavanaugh/liferay-plugins/pull/227

Please let me know if you have any questions.  Thanks!